Reland: Change the video color space default.

media/base/video_types.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_VIDEO_TYPES_H_
 #define MEDIA_BASE_VIDEO_TYPES_H_
 
 #include <string>
 
 #include "build/build_config.h"
@@ skipping 16 matching lines @@
   PIXEL_FORMAT_NV12 =
       6,  // 12bpp with Y plane followed by a 2x2 interleaved UV plane.
 #endif
   PIXEL_FORMAT_ARGB = 7,  // 32bpp ARGB, 1 plane.
   PIXEL_FORMAT_XRGB = 8,  // 24bpp XRGB, 1 plane.
   // Please update UMA histogram enumeration when adding new formats here.
   PIXEL_FORMAT_MAX =
       PIXEL_FORMAT_XRGB,  // Must always be equal to largest entry logged.
 };
 
-// Color space or color range used for the pixels, in general this is left
-// unspecified, meaning Rec601 (SD) is assumed.
+// Color space or color range used for the pixels.
 // Logged to UMA, so never reuse values. Leave gaps if necessary.
 enum ColorSpace {
   COLOR_SPACE_UNSPECIFIED = 0,  // In general this is Rec601.
   COLOR_SPACE_JPEG = 1,         // JPEG color range.
   COLOR_SPACE_HD_REC709 = 2,    // Rec709 "HD" color space.
-  COLOR_SPACE_MAX = COLOR_SPACE_HD_REC709,
+  COLOR_SPACE_SD_REC601 = 3,    // Rec601 "SD" color space.
+  COLOR_SPACE_MAX = COLOR_SPACE_SD_REC601,
 };
 
 // Returns the name of a Format as a string.
 MEDIA_EXPORT std::string VideoPixelFormatToString(VideoPixelFormat format);
 
 // Returns true if |format| is a YUV non interleaved format.
 MEDIA_EXPORT bool IsYuvPlanar(VideoPixelFormat format);
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_VIDEO_TYPES_H_